// Copyright Octelium Labs, LLC. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package utils_types

import (
	"fmt"
	"time"
)

func HumanDuration(d time.Duration) string {
	if d == 0 {
		return ""
	}

	if seconds := int(d.Seconds()); seconds < -1 {
		return "<invalid>"
	} else if seconds < 0 {
		return "0s"
	} else if seconds < 60*2 {
		return fmt.Sprintf("%ds", seconds)
	}

	minutes := int(d / time.Minute)
	if minutes < 10 {
		s := int(d/time.Second) % 60
		if s == 0 {
			return fmt.Sprintf("%dm", minutes)
		}
		return fmt.Sprintf("%dm%ds", minutes, s)
	} else if minutes < 60*3 {
		return fmt.Sprintf("%dm", minutes)
	}
	hours := int(d / time.Hour)
	if hours < 8 {
		m := int(d/time.Minute) % 60
		if m == 0 {
			return fmt.Sprintf("%dh", hours)
		}
		return fmt.Sprintf("%dh%dm", hours, m)
	} else if hours < 48 {
		return fmt.Sprintf("%dh", hours)
	} else if hours < 24*8 {
		h := hours % 24
		if h == 0 {
			return fmt.Sprintf("%dd", hours/24)
		}
		return fmt.Sprintf("%dd%dh", hours/24, h)
	} else if hours < 24*365*2 {
		return fmt.Sprintf("%dd", hours/24)
	} else if hours < 24*365*8 {
		dy := int(hours/24) % 365
		if dy == 0 {
			return fmt.Sprintf("%dy", hours/24/365)
		}
		return fmt.Sprintf("%dy%dd", hours/24/365, dy)
	}
	return fmt.Sprintf("%dy", int(hours/24/365))
}
